minetest/src/texture_override.h

/*
Minetest
Copyright (C) 2020 Hugues Ross <hugues.ross@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#pragma once

#include "irrlichttypes.h"
#include <string>
#include <vector>

//! Bitmask enum specifying what a texture override should apply to
enum class OverrideTarget : u8
{
	INVALID = 0,
	TOP = 1 << 0,
	BOTTOM = 1 << 1,
	LEFT = 1 << 2,
	RIGHT = 1 << 3,
	FRONT = 1 << 4,
	BACK = 1 << 5,
	INVENTORY = 1 << 6,
	WIELD = 1 << 7,

	SIDES = LEFT | RIGHT | FRONT | BACK,
	ALL_FACES = TOP | BOTTOM | SIDES,
	ITEM_TARGETS = INVENTORY | WIELD,
};

struct TextureOverride
{
	std::string id;
	std::string texture;
	u8 target;

	// Helper function for checking if an OverrideTarget is found in
	// a TextureOverride without casting
	inline bool hasTarget(OverrideTarget overrideTarget) const
	{
		return (target & static_cast<u8>(overrideTarget)) != 0;
	}
};

//! Class that provides texture override information from a texture pack
class TextureOverrideSource
{
public:
	TextureOverrideSource(std::string filepath);

	//! Get all overrides that apply to item definitions
	std::vector<TextureOverride> getItemTextureOverrides();

	//! Get all overrides that apply to node definitions
	std::vector<TextureOverride> getNodeTileOverrides();

private:
	std::vector<TextureOverride> m_overrides;
};